The Chauvin Arnoux BR41-BA2 is a reference electrode made of silver, specifically designed for pH and redox measurements. It serves as a reference electrode in combination with separate measuring electrodes to enable precise potential difference measurement. The electrode features a glass body containing a silver wire partially coated with an AgCl film, immersed in a KCl solution with a concentration of 1 mol/l. This configuration ensures a constant and stable reference potential during measurement, which is crucial for the accuracy of pH and redox values.

Applications

The BR41-BA2 is suitable for pH and redox measurements in laboratory and field applications. This configuration is particularly common in educational settings, as it clearly illustrates the operating principle of pH measurement. It is also preferred when the measuring electrode and reference electrode have different lifespans. The electrode is suitable for measurements at temperatures up to 80 °C, with the recommended operating temperature reaching up to 80 °C.

Functions and Equipment in Detail

The electrode features a porous ceramic diaphragm, enabling a simple and reliable connection to the measuring medium. This diaphragm reduces the risk of contamination and thus extends the electrode's service life. The use of KCl 1 mol/l as the reference electrolyte ensures minimal crystallization when the liquid evaporates from the membrane, enhancing the electrode's stability. The electrode is equipped with a 2 mm banana plug, enabling a compatible connection to measuring devices with the corresponding socket.

Technology Explained Simply

In pH measurements, the potential difference between the measuring electrode (which reacts to hydronium ions) and the reference electrode (which provides a constant potential) is measured. The measuring device converts this difference into a pH value. The BR41-BA2 provides the stable reference potential essential for accurate measurement. The silver/silver chloride (Ag/AgCl) technology is an established solution for reference electrodes, offering high stability and reproducibility. The ceramic membrane ensures controlled diffusion of the electrolyte, preventing measurement interference from uncontrolled fluid loss.

Compatibility and Accessories

The BR41-BA2 is to be used in combination with measuring electrodes such as BV41A/H or XV41. Suitable accessories include KCl 1 mol/L solution (30 mL) and Pepsin/HCl solution (125 mL), which are suitable for maintenance and calibration of the electrode. These accessories support the correct function and service life of the electrode.

Mounting and Installation

The electrode is directly immersed in the measuring medium, with the banana plug connected to the measuring device. Installation requires no additional tools or special mounting procedures. The electrode is designed for use in laboratory and field environments, with an operating temperature up to 80 °C.

Operational Advantages

The use of KCl 1 mol/l minimizes crystallization on the membrane and reduces contamination risk, extending the electrode's service life. The ceramic membrane enables reliable electrolyte diffusion, ensuring stable measurement results. The simple handling and compatibility with various measuring electrodes make the BR41-BA2 a reliable choice for precise pH and redox measurements.